Home / 520,032,155.28-717,689,775.23-285,128,216.65

Finding the Fourth Proportional to 520,032,155.28, 717,689,775.23 and 285,128,216.65

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Solution

The fourth proportional to 520,032,155.28, 717,689,775.23 and 285,128,216.65 is: 393,501,831.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,032,155.28 : 717,689,775.23 = 285,128,216.65 : x
  2. Step 2: Convert to fraction form
    520,032,155.28/717,689,775.23 = 285,128,216.65/x
  3. Step 3: Cross multiply
    520,032,155.28x = 717,689,775.23 × 285,128,216.65
  4. Step 4: Simplify right side
    520,032,155.28x = 204,633,605,719,269,216
  5. Step 5: Solve for x
    x = 204,633,605,719,269,216/520,032,155.28
  6. Step 6: Final answer
    x = 393,501,831.84

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.